P3TX questions
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1. What about digital modes like RTTY and PSK at least? How will they
display? For these modes determination of good TX quality will be huge. 2. Distance from the sensor. In the FAQ the distance supported is 5'6" but longer is hinted as being possible. What are the considerations for a longer run (say 20 feet)? For example, bigger conductors, or shielding, or...? 3. Switching sensors. I see that mechanical RJ45 switches are available for low prices, what are the considerations for using a switch? Also, is it strictly necessary to switch all 8 lines? 4. Meter display. This might be my favorite feature to have power/SWR right there at the P3, but the meter display to my eye is at least twice as tall as it needs to be. For digital contesting especially I live and die by the waterfall and hate to give up any real estate. Will the meter display height be adjustable? (I'd be happy with just the numbers down in a corner, like: 98.7 1.2:1 Thanks and 73! jeff wk6i -- Jeff Stai ~ [hidden email] Twisted Oak Winery ~ http://www.twistedoak.com/ Facebook ~ http://www.facebook.com/twistedoak ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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On 05/15/2015 12:34 PM, Jeff Stai wrote:
> 1. What about digital modes like RTTY and PSK at least? How will they > display? For these modes determination of good TX quality will be huge. The P3 screen shows the modulation envelope, so flat-topping of a PSK31 signal, for example, should be obvious. RTTY is constant-envelope modulation so you shouldn't see any amplitude changes. > 2. Distance from the sensor. In the FAQ the distance supported is 5'6" but > longer is hinted as being possible. What are the considerations for a > longer run (say 20 feet)? For example, bigger conductors, or shielding, > or...? I'd say go ahead and try it. I haven't tested longer cables but I can't think of any reason they wouldn't work. All the input pins on the RJ-45 have pi-type R-C filter networks. > 3. Switching sensors. I see that mechanical RJ45 switches are available for > low prices, what are the considerations for using a switch? Also, is it > strictly necessary to switch all 8 lines? I suppose you could just leave the +5V (pin 1) and ground (pin 3) lines connected to both sensors all the time, but a mechanical LAN switch probably switches all 8 wires anyway so it's a moot point. > 4. Meter display. This might be my favorite feature to have power/SWR right > there at the P3, but the meter display to my eye is at least twice as tall > as it needs to be. For digital contesting especially I live and die by the > waterfall and hate to give up any real estate. Will the meter display > height be adjustable? (I'd be happy with just the numbers down in a corner, > like: We're still tweaking the design so a shorter meter face is a possibility. You can also gain some display space by turning off the function key labels with the LABELS key or changing to a smaller type font with the "Font" menu selection. Alan N1AL ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Will we be able to turn off the wattmeters?
I have a KPA500 sitting right next to my P3 so the meter is redundant From: Alan Bloom <[hidden email]> To: [hidden email] Sent: Friday, May 15, 2015 9:07 PM Subject: Re: [Elecraft] P3TX questions On 05/15/2015 12:34 PM, Jeff Stai wrote: > 1. What about digital modes like RTTY and PSK at least? How will they > display? For these modes determination of good TX quality will be huge. The P3 screen shows the modulation envelope, so flat-topping of a PSK31 signal, for example, should be obvious. RTTY is constant-envelope modulation so you shouldn't see any amplitude changes. > 2. Distance from the sensor. In the FAQ the distance supported is 5'6" but > longer is hinted as being possible. What are the considerations for a > longer run (say 20 feet)? For example, bigger conductors, or shielding, > or...? I'd say go ahead and try it. I haven't tested longer cables but I can't think of any reason they wouldn't work. All the input pins on the RJ-45 have pi-type R-C filter networks. > 3. Switching sensors. I see that mechanical RJ45 switches are available for > low prices, what are the considerations for using a switch? Also, is it > strictly necessary to switch all 8 lines? I suppose you could just leave the +5V (pin 1) and ground (pin 3) lines connected to both sensors all the time, but a mechanical LAN switch probably switches all 8 wires anyway so it's a moot point. > 4. Meter display. This might be my favorite feature to have power/SWR right > there at the P3, but the meter display to my eye is at least twice as tall > as it needs to be. For digital contesting especially I live and die by the > waterfall and hate to give up any real estate. Will the meter display > height be adjustable? (I'd be happy with just the numbers down in a corner, > like: We're still tweaking the design so a shorter meter face is a possibility. You can also gain some display space by turning off the function key labels with the LABELS key or changing to a smaller type font with the "Font" menu selection. Alan N1AL ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Alan Bloom-2
On Fri, May 15, 2015 at 6:07 PM, Alan Bloom <[hidden email]> wrote:
> 3. Switching sensors. I see that mechanical RJ45 switches are available for >> low prices, what are the considerations for using a switch? Also, is it >> strictly necessary to switch all 8 lines? >> > > I suppose you could just leave the +5V (pin 1) and ground (pin 3) lines > connected to both sensors all the time, but a mechanical LAN switch > probably switches all 8 wires anyway so it's a moot point. > hi Alan - Thanks for the answers! To the above point, one might want to build a relay-based switch that follows band data, so fewer relays would be desirable... 73! jeff wk6i -- Jeff Stai ~ [hidden email] Twisted Oak Winery ~ http://www.twistedoak.com/ Facebook ~ http://www.facebook.com/twistedoak ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Elecraft mailing list
Yes, both the meters and the modulation envelope display can be
independently enabled/disabled. The P3 "analog" power meter shows both the average and peak power and there are digital readouts of peak power and SWR. Alan N1AL On 05/15/2015 06:40 PM, Harry Yingst wrote: > Will we be able to turn off the wattmeters? > > I have a KPA500 sitting right next to my P3 so the meter is redundant > > > > ------------------------------------------------------------------------ > *From:* Alan Bloom <[hidden email]> > *To:* [hidden email] > *Sent:* Friday, May 15, 2015 9:07 PM > *Subject:* Re: [Elecraft] P3TX questions > > On 05/15/2015 12:34 PM, Jeff Stai wrote: > > 1. What about digital modes like RTTY and PSK at least? How will they > > display? For these modes determination of good TX quality will be huge. > > The P3 screen shows the modulation envelope, so flat-topping of a PSK31 > signal, for example, should be obvious. RTTY is constant-envelope > modulation so you shouldn't see any amplitude changes. > > > 2. Distance from the sensor. In the FAQ the distance supported is > 5'6" but > > longer is hinted as being possible. What are the considerations for a > > longer run (say 20 feet)? For example, bigger conductors, or shielding, > > or...? > > I'd say go ahead and try it. I haven't tested longer cables but I can't > think of any reason they wouldn't work. All the input pins on the RJ-45 > have pi-type R-C filter networks. > > > 3. Switching sensors. I see that mechanical RJ45 switches are > available for > > low prices, what are the considerations for using a switch? Also, is it > > strictly necessary to switch all 8 lines? > > I suppose you could just leave the +5V (pin 1) and ground (pin 3) lines > connected to both sensors all the time, but a mechanical LAN switch > probably switches all 8 wires anyway so it's a moot point. > > > 4. Meter display. This might be my favorite feature to have > power/SWR right > > there at the P3, but the meter display to my eye is at least twice > as tall > > as it needs to be. For digital contesting especially I live and die > by the > > waterfall and hate to give up any real estate. Will the meter display > > height be adjustable? (I'd be happy with just the numbers down in a > corner, > > like: > > We're still tweaking the design so a shorter meter face is a > possibility. You can also gain some display space by turning off the > function key labels with the LABELS key or changing to a smaller type > font with the "Font" menu selection. > > Alan N1AL > > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] <mailto:[hidden email]> > > This list hosted by: http://www.qsl.net <http://www.qsl.net/> > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] <mailto:[hidden email]> > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Alan Bloom-2
Hi Alan,
Are there plans to display the transmitted envelope on an SVGA monitor in the future. Would it require a different SVGA board? 73, Mike K2MK
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In reply to this post by Elecraft mailing list
Looking at Q4 on the FAQ:
4. Will I be able to see the Transmit waveform on an SVGA monitor, too? A. No. The transmit signal results will be on the main P3 display screen. Can I assume the waterfall display will remain the same as it is today, on the SVGA monitor? -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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On 05/16/2015 06:51 AM, David Cole wrote:
> Can I assume the waterfall display will remain the same as it is today, > on the SVGA monitor? Yes, the SVGA display is unchanged. Alan N1AL ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Mike K2MK
Hi Mike,
I don't believe there are any plans to display the transmitted envelope on the external SVGA monitor. The way the SVGA works is the I/Q data for the spectrum/waterfall display are streamed continuously to the SVGA via an SPI bus. The SVGA then basically duplicates everything the main processor is doing for the main display in order to display the spectrum and waterfall on the external monitor. The issue with displaying the power information is that it does not exist in the SVGA module. The main processor would have to somehow send the information in real time to the SVGA, which would then display it. There is an I2C bus between the two modules that is used for communications and control, but I don't think it would have enough bandwidth to handle real-time power data. Perhaps the main processor could pre-process the data and compress it somehow for transmission, but it would not be a simple task. Perhaps not impossible - I'll have to think some more about it. Alan N1AL On 05/16/2015 05:48 AM, Mike K2MK wrote: > Hi Alan, > > Are there plans to display the transmitted envelope on an SVGA monitor in > the future. Would it require a different SVGA board? > > 73, > Mike K2MK > > > Alan Bloom-2 wrote >> On 05/15/2015 12:34 PM, Jeff Stai wrote: >>> 1. What about digital modes like RTTY and PSK at least? How will they >>> display? For these modes determination of good TX quality will be huge. >> >> The P3 screen shows the modulation envelope, so flat-topping of a PSK31 >> signal, for example, should be obvious. RTTY is constant-envelope >> modulation so you shouldn't see any amplitude changes. >> >>> 2. Distance from the sensor. In the FAQ the distance supported is 5'6" >>> but >>> longer is hinted as being possible. What are the considerations for a >>> longer run (say 20 feet)? For example, bigger conductors, or shielding, >>> or...? >> >> I'd say go ahead and try it. I haven't tested longer cables but I can't >> think of any reason they wouldn't work. All the input pins on the RJ-45 >> have pi-type R-C filter networks. >> >>> 3. Switching sensors. I see that mechanical RJ45 switches are available >>> for >>> low prices, what are the considerations for using a switch? Also, is it >>> strictly necessary to switch all 8 lines? >> >> I suppose you could just leave the +5V (pin 1) and ground (pin 3) lines >> connected to both sensors all the time, but a mechanical LAN switch >> probably switches all 8 wires anyway so it's a moot point. >> >>> 4. Meter display. This might be my favorite feature to have power/SWR >>> right >>> there at the P3, but the meter display to my eye is at least twice as >>> tall >>> as it needs to be. For digital contesting especially I live and die by >>> the >>> waterfall and hate to give up any real estate. Will the meter display >>> height be adjustable? (I'd be happy with just the numbers down in a >>> corner, >>> like: >> >> We're still tweaking the design so a shorter meter face is a >> possibility. You can also gain some display space by turning off the >> function key labels with the LABELS key or changing to a smaller type >> font with the "Font" menu selection. >> >> Alan N1AL > > > > > > -- > View this message in context: http://elecraft.365791.n2.nabble.com/P3TX-questions-tp7602930p7602976.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Alan Bloom-2
Thanks Alan!!
-- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info On Sat, 2015-05-16 at 16:12 -0700, Alan Bloom wrote: > On 05/16/2015 06:51 AM, David Cole wrote: > > > Can I assume the waterfall display will remain the same as it is today, > > on the SVGA monitor? > > Yes, the SVGA display is unchanged. > > Alan N1AL > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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